synchronization

Hello everyone, I am new in the forum I would like help please I have a mitsubishi mf 91 and the strap of the times is volume some help to mount it I would already like the valve I only need to mount the camera and place the belt but I do not know what the point goes the piston when it mount the camera that valve are open or closed thanks to who can help me

You have to put the first cylinder in PMS I bone the piston completely up and the valves of the first cylinder have to be closed and those of the 4 cylinder in overlap starting to open and close that you verify it with the very easy motor turn